Optimum Design And Experimental Research Of Piezoelectric Vibration Motor

With the rapid development of science and technology,people's experience in the use of smart electronic devices has become increasingly demanding and relying on sound to provide feedback has been unable to meet people's needs,people will turn their attention to tactile feedback technology,tactile feedback technology It is based on vibration motor technology.Although the existing vibration motor technology is relatively mature and the cost is low,the technical features have many defects and cannot provide a tactile experience with a shorter response time and a wider response frequency range.Piezoelectric vibration motors are a new type of tactile feedback technology that creates a richer and more delicate tactile experience.It provides a single-cycle,fast-start experience that controls the frequency,amplitude,and phase of vibration,allowing the user to control the feeling of vibration and Its strength,low power consumption,low profile,light weight and non-magnetic properties make it an ideal choice for professional biomedical and industrial communications.Therefore,this paper presents a piezoelectric vibration motor technology with low power consumption,strong vibration,resonant frequency bandwidth and short response time.The analysis of this technology is as follows:First,the application prospects and existing technologies in the field of existing vibration motors are analyzed.After comprehensively comparing the advantages and disadvantages of the existing vibration motor technology,the technical advantages and wide application prospects of the piezoelectric vibration motor are summarized.The characteristics and application advantages of piezoelectric materials are introduced.The structural characteristics,application technology characteristics and output response characteristics of the piezoelectric bimorph vibrator are described in detail,which lays a theoretical foundation for the subsequent structural design and theoretical analysis.The theoretical analysis of the vibration power consumption of the piezoelectric vibration motor was carried out.The resonance theory analysis and the structural design of the piezoelectric vibration motor's mover were followed.The modal harmonic response analysis of the mover was performed using ANSYS and the rationality was found.The resonance frequency order and the strength of weak parts of the vibration system are strengthened,Piezoelectric coupling analysis was performed using Piezo And MEMS(ANSYS ACT plug-in module).The frequency-displacement response curve of the motor's mover was obtained,which provided a basis for validating the theoretical calculation and structural optimization.Then,a mathematical model of the vibration of a piezoelectric vibration motor was established,and a piezoelectric vibration motor structure was designed.The key factors affecting the vibration effect are found through theoretical analysis.The integral vibration system of the piezoelectric vibration motor is simulated and simulated using the optimized design function of the AWE module.The natural frequency and vibration acceleration of the entire vibration system are obtained through parametric modeling and optimization.The design obtained the best structure size and increased the overall vibration acceleration by 30%.Finally,an experimental prototype was built and a vibration test platform was built.Through the experiment,the following conclusions were reached:The piezoelectric vibration motor system has the maximum vibration acceleration and vibration displacement when operating at the natural frequency;when the system damping is greater,the motor brakes The time is shorter,but the system power consumption increases;when the driving voltage waveform is a sine wave,the motor system has a larger vibration acceleration and the system noise is smaller;the piezoelectric vibration motor designed in this paper is driven by a 100V sine wave voltage.The vibration acceleration of 0.68m/s~2 can be obtained and the start-stop time can be within 10ms.It has a wider resonance frequency band and less vibration noise.